Holleyweb Water Heater 3/4'' 110V Hot Water Circulation Circulator Circulating Pump For Solar Heater System With US Plug Inlet/Outlet:3/4",Max Flow(GPM):13/9/6,Max Head(FT):20/17/10 Power(W):93/67/46 Materials: Pump housing: Cast Iron; Impeller: Corrosion-resistant, Composite, PES; Shaft: Ceramic;Bearing: Carbon axial. Motor Feature: Single phase,Closed, externally ventilated, Heavy Duty Motor housing (Won't get overheat even continuous running), Insulation class: F,Protection class: IP44